RSA加解密算法代码C语言编写，可对字符串和文件加密-RSA encryption algorithm code written in C language, may to the string and file encryption

自己编写的将字符串base64加密解密，测试通过，linux可以编译成功，方便移植-I have written a string base64 encryption and decryption, the test passes, linux can be compiled successfully facilitate transplantation